These data represent the WGFD-edited version of statistically-based polygons derived from GPS collar data collected from 118 mule deer migrating in the Baggs mule deer herd unit (MD427). The animals collared are from the northern portion (Dad/Atlantic Rim; 38 mule deer and 90 migration sequences), and the southern portion (Wild Horse; 80 mule deer and 208 migration sequences) of the herd unit. The data were collected from 2005 through 2016. The GPS data were analyzed using the Brownian Bridge Movement Model (BBMM), which produced polygons based on where animals traversed from winter range to summer range (and back) and how much time they spent along the way. The original data were edited to be more manageable on the ground as the WGFD works with land management agencies during land use planning.